$.fn.decimalinput = function(place) {
	//-------默认两位-------
	if(place ==''||place==undefined){
		place =2;
	}
    $(this).css("ime-mode", "disabled");
	this.bind("keypress", function(e) {
		if (e.charCode === 0)
			return true; // 非字符键 for firefox
		var code = (e.keyCode ? e.keyCode : e.which); // 兼容火狐 IE
		if (code >= 48 && code <= 57) {
			var pos = getCurPosition(this);
			var selText = getSelectedText(this);
			var dotPos = this.value.indexOf(".");
			if (dotPos > 0 && pos > dotPos) {
				if (pos > dotPos + place)
					return false;
				if (selText.length > 0
						|| this.value.substr(dotPos + 1).length < place)
					return true;
				else
					return false;
			}
			return true;
		}
		// 输入"."
		if (code == 46) {
			var selText = getSelectedText(this);
			if (selText.indexOf(".") > 0)
				return true; // 选中文本包含"."
			else if (/^[0-9]+\.$/.test(this.value + String.fromCharCode(code)))
				return true;
		}
		return false;
	});
	this.bind("blur", function() {
		if (this.value.lastIndexOf(".") == (this.value.length - 1)) {
			this.value = this.value.substr(0, this.value.length - 1);
		} else if (isNaN(this.value)) {
			this.value = "";
		}
		if (this.value)
		            this.value = parseFloat(this.value).toFixed(place);
		        $(this).trigger("input");
		    });
		    this.bind("paste", function() {
		        if (window.clipboardData) {
		            var s = clipboardData.getData('text');
		            if (!isNaN(s)) {
		                value = parseFloat(s);
		                return true;
		            }
		        }
		        return false;
		    });
		    this.bind("dragenter", function() {
		        return false;
		    });
		    this.bind("keyup", function() {
		    });
		    this.bind("propertychange", function(e) {
		        if (isNaN(this.value))
		            this.value = this.value.replace(/[^0-9\.]/g, "");
		    });
		    this.bind("input", function(e) {
		        if (isNaN(this.value))
		            this.value = this.value.replace(/[^0-9\.]/g, "");
		    });
		};
 
		//获取当前光标在文本框的位置
		function getCurPosition(domObj) {
		    var position = 0;
		    if (domObj.selectionStart || domObj.selectionStart == '0') {
		        position = domObj.selectionStart;
		    }
		    else if (document.selection) { //for IE
		        domObj.focus();
		        var currentRange = document.selection.createRange();
		        var workRange = currentRange.duplicate();
		        domObj.select();
		        var allRange = document.selection.createRange();
		        while (workRange.compareEndPoints("StartToStart", allRange) > 0) {
		            workRange.moveStart("character", -1);
		            position++;
		        }
		        currentRange.select();
		    }
		    return position;
		}
		//获取当前文本框选中的文本
		function getSelectedText(domObj) {
		    if (domObj.selectionStart || domObj.selectionStart == '0') {
		        return domObj.value.substring(domObj.selectionStart, domObj.selectionEnd);
		    }
		    else if (document.selection) { //for IE
		        domObj.focus();
		        var sel = document.selection.createRange();
		        return sel.text;
		    }
		    else return '';
		}